Asterisk and AddPac AP 100 connectivity

Question

I have analog phone connected to AddPac gateway. I am trying to connect it to asterisk through SIP. Here is the configuration (relevant lines):

sip.conf

[user]
type=friend
context=office
host=192.168.31.11
secret=user
username=user
dtfmmode=auto

extensions.conf

[office]
exten => 20,1, Dial(SIP/user)

AddPac have web interface, so I have configured it to use SIP, set SIP server IP address, username, password.

when I execute sip show peers I get this:

Name/username              Host            Dyn Nat ACL Port     Status
user/user                 192.168.31.11               5060     Unmonitored

By the way, what does unmonitored mean?

Ping is successful. I think I am missing something obvious here. Thanks for help.

Answer 1

Removed this line:

dtfmmode=auto

and everything started to work.

Answer 2

If you would like to monitor if the sip peer is still alive then add;

qualify=yes

or specify timeout(in ms) like so;

qualify=100